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Cisco Cisco Access Registrar 4.2 Spezifikationen

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Cisco Systems, Inc.
All contents are Copyright © 1992–2002 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.
Page 1 of 42
White Paper
Extensible Authentication Protocol Transport Layer Security
Deployment Guide for Wireless LAN Networks
1 Scope
This document discusses the Extensible
Authentication Protocol Transport Layer
Security(EAP-TLS)authenticationprotocol
deployment in wireless networks. It
introduces the EAP-TLS architecture and
then discusses deployment issues. An
example enterprise rollout for EAP-TLS is
discussed in the section “Validation Lab”
(Section 6).
2 Background
In September 1999, the IEEE approved
the 802.11b (2.4-gigahertz [GHz] range,
11-Mbpsthroughput)and802.11a(5-GHz
range, 54-Mbps throughput) extensions.
Since then, adoption of wireless LAN
(WLAN) solutions in vertical (retail,
education, health care, transportation,
and so on) and horizontal markets has
accelerated. As standardized by the
IEEE, security for 802.11 networks can be
simplified into two main components:
authentication and encryption. The
implementation of these components
has been proven insecure and has been
extensively documented by the security
community.
An alternative WLAN security approach
focuses on developing a framework for
providing centralized authentication and
dynamic key distribution. A proposal
jointly submitted to the IEEE by Cisco
Systems, Microsoft, and other
organizations introduced an end-to-end
framework using 802.1X and the EAP to
providethisenhancedfunctionality.Central
to this proposal are two main elements:
• EAP allows wireless client adapters,
which may support different
authentication types, to communicate
with different back-end servers such as
Remote Access Dial-In User Service
(RADIUS)
• IEEE802.1X,astandard for port-based
network access control
To support all popular operating systems,
Ciscoemployeesdesignedandimplemented
Lightweight Extensible Authentication
Protocol(LEAP)—anetwork-EAPprotocol
based on 802.1x authentication
framework—on Cisco Aironet
®
WLAN
products and solutions. Microsoft’s latest
operating system, Windows XP, provides
support for 802.1x (specifically EAP-TLS
andEAPMessageDigest5[MD5]).Thus,a
varietyof EAPauthenticationprotocols can
be used to authenticate users in today’s
WLAN networks. Figure 2-1 illustrates the
mixed EAP protocol deployment in a
WLAN network:
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Inhaltsverzeichnis

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Seite 6 - 4.1.1 The Amazon.com Example

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Seite 8 - 4.2.1 How EAP with TLS Works

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Seite 18 - Server-SW

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Seite 27 - i. Enter the ACS IP address

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Corporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel: 408 526-4000800 553-NETS (6387)Fax: 408 526-

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